PASSION, FERVOR, ARDOR, ENTHUSIASM, ZEAL mean intense emotion compelling action.

PASSION applies to an emotion that is deeply stirring or ungovernable.

e.g. was a slave to his passions

FERVOR implies a warm and steady emotion.

e.g. read the poem aloud with great fervor

ARDOR suggests warm and excited feeling likely to be fitful or short-lived.

e.g. the ardor of their honeymoon soon faded

ENTHUSIASM applies to lively or eager interest in or admiration for a proposal, cause, or activity.

e.g. never showed much enthusiasm for sports

ZEAL implies energetic and unflagging pursuit of an aim or devotion to a cause.

e.g. preaches with fanatical zeal

source: [セイバーオルタが熱狂している客達の中心に立って偉そうにしているGIF画像｜無料GIF画像検索 GIFMAGAZINE 687409]

1. intense and eager enjoyment, interest, or approval:

〖時にan ～〗 «…に対する» 熱意, やる気; 熱中, 熱狂 «for, about» ; «…したいという» 情熱 «for doing, to do»

e.g. her energy and enthusiasm for life

e.g. few expressed enthusiasm about the current leaders.

a thing that arouses feelings of intense and eager enjoyment:

｟かたく｠ 熱中している活動, 仕事, 熱中させるもの

e.g. the three enthusiasms of his life were politics, religion, and books.

2. archaic, derogatory religious fervor supposedly resulting directly from divine inspiration, typically involving speaking in tongues and wild, uncoordinated movements of the body.

｟古｠ 宗教的狂信

early 17th century (in enthusiasm (sense 2) ): from French enthousiasme, or via late Latin from Greek enthousiasmos, from enthous ‘possessed by a god, inspired’ (based on theos ‘god’).